Title:
SN ALLOY POWDER FOR NEGATIVE ELECTRODES OF LITHIUM ION BATTERIES, AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2012/086835
Kind Code:
A1
Abstract:
Provided is an Sn alloy powder for negative electrodes of lithium ion batteries, which contains, in at%, 35-50% of Co and/or Fe (provided that Co and Fe can be partially substituted by Ni within the range where Ni%/(Co% + Fe% + Ni%) is 0.3 or less), 3-10% of Ti and/or Zr, 0-5% of In, 0-10% of Cu and/or Ag, with the balance made up of Sn and unavoidable impurities. This powder has such a feature that when Co and/or Fe is represented by M, the intensity ratio of the MSn2[211] peak relative to the MSn[110] peak is 0.10-2.50, the intensity ratio of the Sn[101] peak relative to the MSn[110] peak is 0.50 or less, and the intensity ratio of the M3Sn2[102] peak relative to the MSn[110] peak is 0.10-1.00 as determined by X-ray diffraction. This Sn alloy powder for negative electrodes of lithium ion batteries has excellent discharge capacity and excellent cycle life.
Inventors:
SAWADA TOSHIYUKI (JP)
Application Number:
PCT/JP2011/080004
Publication Date:
June 28, 2012
Filing Date:
December 26, 2011
Export Citation:
Assignee:
SANYO SPECIAL STEEL CO LTD (JP)
SAWADA TOSHIYUKI (JP)
SAWADA TOSHIYUKI (JP)
International Classes:
H01M4/38; B22F1/00; B22F5/00; B22F9/04; B22F9/08; C22C13/00
Foreign References:
| JP2009048824A | 2009-03-05 | |||
| JP2006024517A | 2006-01-26 | |||
| JP2006236835A | 2006-09-07 | |||
| JP2008066025A | 2008-03-21 |
Attorney, Agent or Firm:
KATSUNUMA Hirohito et al. (JP)
Katsunuma Hirohito (JP)
Katsunuma Hirohito (JP)
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Claims: